How long, will it be, before you'd be able to return to the workforce? I wouldn't call the infancy years, boredom, but I would refer to it, as monotonous, at times. Stuck, is a word I have, at times found myself using, when I was once a stay at home mom, I was with three little ones, and for a couple of months, changing three sets of diapers.
It's easy to start feeling disconnected from the life one, used to know. And it many ways, it can be career stagnating, and frankly, that's a fear for anyone with ambitions and intelligence.
What about a co-op daycare, where you can volunteer for a fraction of the full price? Or, even finding time, to read, research, connect online with other stay at home moms? Learn some new skills, while you bide your time, waiting for the day, you can find out what you'd like to do with your career life?

And, have you seen a doctor, about how you are feeling?